Seat Leon >> Removing and installing expansion valve

Special tools and workshop equipment required

  • Air conditioner service station
  • Engine bung set - VAS 6122-

Air conditioning system

Removal:

  •  Turn off the ignition and all electricity consumers.

Vehicles without access and start authorisation system

  •  Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Extract refrigerant.
  • Observe instructions when working on refrigerant circuit.

Vehicles with petrol engine:

  • Release hose clips -1- and -2- and remove air intake pipe.

Diesel engine vehicles:

Air conditioning system

  • Press the release buttons at the crankcase breather hose -1- and detach the hose from the cylinder head cover.
  • Lay bare the vacuum hoses at the air pipe -arrows-.
  • Release hose clip -3-.
  • Screw out the bolt -2-, swivel the air pipe with connection to the rear and detach from the turbocharger.

Air conditioning system

All vehicles (continued):

  • Unscrew the speed nuts -1, 3-.
  • Fold the heat shield -2- as far forwards as possible -arrow-.

Air conditioning system

  • Screw out bolt -1-.
  • Detach refrigerant line -2- with internal heat exchanger from expansion valve.

Air conditioning system

  • Unscrew bolts -1- and -3-.
  • Pull the expansion valve -4- out of the heat insulation -2-.
  • Seal open lines and connections with clean plugs from the Engine sealing plug set - VAS 6122- .

Installing

Install in reverse order of removal; note the following.

  • Replace the O-rings.
  • Insert the O-rings -1, 4- at the connecting pipes -2, 3- to the evaporator.

Note

  • There are different versions of the expansion valve (identical housing, but different control characteristic).
  • Check the refrigerant pipes to the evaporator for contamination and damage.
  • Moisten O-rings with refrigerant oil before installing.
  • Pay attention to correct positioning of the O-rings at the evaporator connecting pipes.
  • The absence of or incorrect installation of the heat insulation -2- may lead to reduced air conditioner output (heat-induced change in set characteristic control curve).

 

  • Refill with refrigerant and refrigerant oil.

Air conditioning system

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    See also:

    Removing and installing parking brake lever, vehicles with manual parking brake
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